A superimposed sleeve for dacryocystorhinostomy and preparation method thereof

Abstract

The invention discloses a folded cannula used for dacryocystorhinostomy and a preparation method thereof. The folded cannula includes a drainage header pipe and a drainage branch pipe, and a bubble bag is arranged on the drainage header pipe; an oval drainage disc and a tail fixing screw are arranged at both ends of the drainage branch pipe respectively, the tail fixing screw extends to an internal hole forming part of a nasal cavity, and a cannula body used for fixation is installed on the tail fixing screw through a buckle. A hollow silica gel catheter is selected, after the two ends of thesilica gel catheter are penetrated, the silica gel catheter is adopted as the drainage header pipe, and the drainage branch pipe is fixedly installed along the central axes of the two ends of the drainage header pipe; the end faces of the outer side of the drainage branch pipe are all polished, and the oval drainage disc and the tail fixing screw are additionally arranged; according to shape requirements, heating for shaping is conducted on the drainage pipes. More convenience is provided for implanting, extra traction devices are not required, complicated treatment such as knotting is not required in the nasal cavity, patients feel comfortable, and no secondary injuries are caused; by designing the drainage pipes in hollow shapes, tears can be drained normally, infection is not caused easily, and symptoms are alleviated obviously during implanting.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a stacked sleeve used for dacryocystorhinostomy and a preparation method thereof. Background technique [0002] Chronic dacryocystitis tends to occur in female patients. In addition to traditional eye surgery, the most commonly used method for its treatment is endoscopic dacryocystorhinostomy, which has been carried out in China for nearly 20 years. However, for For Chinese women, the volume of the lacrimal sac and nasal cavity is relatively small, which is likely to cause narrow adhesions or even atresia at the stoma, leading to recurrence after surgery failure, or even relapse. How to avoid it has always been a clinical problem. Most of the existing implant devices are designed for traditional ophthalmic surgery and are not suitable for the use of nasal endoscopic surgery. There are problems such as difficult implantation, many complications and poor comfort. [0003]...

AI Technical Summary

Problems solved by technology

It is difficult to implant the existing lacrimal drainage tube, and the implantation of the retractor takes a long time. Simultaneous implantation of lower lacrimal puncta may cause complications such as shearing and tearing of puncta. The inner canthus is occupied by ducts, and the foreign body sensation is strong. And most importantly, prior art solutions are inconvenient for flushing the lacrimal duct during implantation

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